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Q: What is the maximum limit of water-soluble content (percentage by mass) present in fly ash, which could be used as an additive to brick earth?
  • A. 1.5%
  • B. 5%
  • C. 15%
  • D. 0.1%
Correct Answer: Option D - Apparatus required for water absorption test– The following apparatuses are required for the testing of water absorption of fly ash bricks. (i) A sensitive weighing balance capable of weighing within 0.1% of the total mass of the specimen. (ii) Ventilated oven [1100C ( ±5 ⁰C)] (iii) Water bath [270C (± 12⁰C)] (iv) Damp cloths.
D. Apparatus required for water absorption test– The following apparatuses are required for the testing of water absorption of fly ash bricks. (i) A sensitive weighing balance capable of weighing within 0.1% of the total mass of the specimen. (ii) Ventilated oven [1100C ( ±5 ⁰C)] (iii) Water bath [270C (± 12⁰C)] (iv) Damp cloths.

Explanations:

Apparatus required for water absorption test– The following apparatuses are required for the testing of water absorption of fly ash bricks. (i) A sensitive weighing balance capable of weighing within 0.1% of the total mass of the specimen. (ii) Ventilated oven [1100C ( ±5 ⁰C)] (iii) Water bath [270C (± 12⁰C)] (iv) Damp cloths.